Question

a)   14+√28  = ? alguem tem a soluçao pra esse problema ??
     √7

Answer 1

$\frac{14+\sqrt{28}}{\sqrt7}=\frac{14+\sqrt{4.7}}{\sqrt7}=\frac{14+2\sqrt7}{\sqrt7}=\frac{14}{\sqrt7}+\frac{2\sqrt7}{\sqrt7}=\frac{14\sqrt7}{7}+2=2\sqrt7+2=2(1+\sqrt7)$